Flea collar for cats using natural herbs, effective for approximately 28 days. - Product Name: Natural Herb Flea Collar - Purpose: For cats - Effect: Flea prevention - Country of Manufacture: Made in Japan - Contents: Total 37cm, usable for approximately 28 days This is a flea collar for cats using natural herbs, with an effective duration of approximately 28 days. If you are looking for one, how about this? It has been stored at home, so the outer box is slightly warped, but it is new. I took it out for the photos. Thank you for viewing. Thank you. Perfect for the coming season! My beloved cat Cat love Cat food Cat flea prevention, heartworm prevention Longevity